code: def gauge(self, name: str, obj: Callable[[], int]) -> None:
      self._metrics.gauge(name, JMetricGauge(PythonGaugeCallable(obj)))
  
file_path: flink/flink-python/pyflink/fn_execution/metrics/embedded/metric_impl.py
imports: from typing import Callable
  from pemja import findClass
  from pyflink.fn_execution.metrics.embedded.counter_impl import CounterImpl
  from pyflink.fn_execution.metrics.embedded.distribution_impl import DistributionImpl
  from pyflink.fn_execution.metrics.embedded.meter_impl import MeterImpl
  from pyflink.metrics import MetricGroup, Counter, Distribution, Meter
label_desc: Use image node_id 4 for calling the MetricGroupImpl obj's underlying member method code with example usage: obj.gauge(name, obj) without return types